JMS has two directorial credits to his name: "Sleeping in Light," the last episode of B5, and Babylon 5: The Lost Tales. So hardly "most" of the episodes.JMS was the Series Creator, also wrote & Directed most of the episodes for the entire 5 season run.
He was the showrunner, and he wrote most of the episodes over the course of its run, but he didn't direct much of the show.
JMS commonly said in interviews when B5 was airing that his big doc on the show was double or triple encrypted on his computer. In actually, he just had it in a binder sitting on a shelf in his office.JMS had to change a lot of plans after Michael O'Hare's mental issues forced him to leave the show, and then the condensing of the final arc of the show in season 4 when it was looking like the series was going to be cancelled. From what I know of his original plan document, it wasn't as strictly regimented as folks think.
